Pressure fighters age out quicker than most...Tyson, Hatton, Joe Frazier, Floyd Patterson, Aaron Pryor....those are the fighters with all the moving pieces and who take damage to inflict punishment of their own. At age 27-29 they slow down a great deal.

Guys who can hit and not get hit last longer.....guys who can absorb punishment can last even longer depending on who they are fighting. Ali took a lot of damage, James Toney, Evander Holyfield, Riddick Bowe even...they lasted long stretches, but their health has/will suffer because of it.



I think you've got so many punches, so many rounds, so much damage you can take over an amount of time and there's only so much you can heal up afterwards. I think you have to take it on a fighter by fighter basis...look at Willie Pep, fought 241 fights and was still fresh as a daisy because he rarely got hit and then you've got 'The American Dream' David Reid who only fought 19 total bouts because ptosis and other eye troubles namely Tito Trinidad detatching his retina because Tito hit him hard and often, and he had eye troubles since the Olympic trials.